Nut-lock



(No Model.) I

J. HOWARD. NUT LOOK.

No. 433,128. Patented July 29, 1890.

A Mi- [barren States PATENT OFFICE.

JJOS'EPHUS HOWARD, OE BOSTON, MASSACHUSETTS.

NUT-LOCK.

SPEQTFICATION forming part of Letters Patent No. 433,128, dated July'29, 1890.

Application filed May 10, 1890- Serisl Na 35L3ll- (No model.) 7

To all whom it may concern.-

Be itknown that I, J OSEPHUS HOWARD, a subject; of the Queen of Great Britain, residins, at Boston, in the county of Suffolk and State of Massachusetts,have invented a new and useful Improvementin Nut-Loeks,which I will describe as follows, reference being had to the accompanying drawings, which form a part of this Specification, like letters indicate like parts in the different figures thereof.

Figure 1 of the drawings shows in perspective my nut lock or washer. 2 is a transverse sect on, and illustrates the application of the invention upon a railroad-track bolt. Fig. 3 is a plan showing the inside face of the unblock, and Fig. 4 is a vertical central section of the nut-lock.

My invent-ion is especially applicable to railroad-track bolts, but may be used, of course, with an y other bolts ornuts where practicable.

The invention consists in a nut-lock, in the general form of a washer, bent to secure the necessary leverage upon the nut and made thicker upon the inside face of the bent side of the Washer, so that when the nut tries to work off, its bearing upon said thick side of the nut-lock crowds the opposite side of the said look into the thread of the bolt, and thus holds the nut tighter than ever, the said lock holding upon both sides.

In the drawings, A represents the nut-lock, and a the thicker part, above referred to. This thick part should be, preferably, all one piece with the washer. It is better that the washer be eight-sided, as shown in the drawings, and it should be made of steel or of some material harder than that of which;

the nut and bolt are made so that the at tempted working off of the nut will not Wear the lock. The one thread a in the opening a is of importance in turning the washer A on and off of the bolt B, and the additional thread and groove in the thick part a designated a set the lock thoroughly when it has been set up by the use ofa wrench. The bend in the Washer above referred to is designated -a' in the drawings.

It is perhaps not necessary to state in explanation of Fig.2 that C represents a railroadrailyd (l are the fish-plates; B, the track-bolt,

and c the nut upon the track-bolt.

\Vhat I claim as new, and desire to secure by Letters Paton t, is-

A nut-1ock bent upon one side and inane, thicker on the inside face of sail bent side, said nut-lock being provided witl one thread extending completely round within the opening in the center of said lock or washer, and also provided with one additional thread and groovein said thicker side, constructed and arranged substantially as described and shown,

and for the purpose set forth.

2. The nut lock or washer A,bcnt as shown at a, and made thicker at a, said washerbeing provided with the thread a in the open ing (1 and alsoprovjded with the additional thread and grooveofiin combination with the bolt B and nut e t-hetvhole constructed and arranged substantialli; as described and shown, and for the purpose set forth.

' .iosEPuUs HOWARD.

itnesses:

FRANCIS M. BoUTwnLL, J. ALFRED ANDERSON. 

